- From Los Angeles, California.
- Formed in the early 1960’s by Chris Hillman, mandolin; Don Parmley, banjo; Vern Gosdin, guitar; and Rex Gosdin, bass.
- Original name: The Blue Diamond Boys. (The Hillmen name was only used on the re-issue of the group’s album, several years after the group broke up.)
- Parmley and the Gosdin brothers had previously worked with a Los Angeles group called The Golden State Boys.
- Performed on a Los Angeles TV show called Country Music Time.